Common Failures and Solutions about Electronic Weighing

Electronic scales common fault repair common sense, electronic forklift scales, electronic weighbridge, electronic cylinder scales, electronic platform scales for appearance inspection, check the instrument shell, switch and keyboard are normal, the display and scale body is disconnected, available sensor simulator instead of the sensor to determine the instrument failure, or electronic scale failure, so that you can quickly and accurately find the fault site.

Common failures and maintenance about electronic weighing

• The power on flicker more than. Whether the electronic scale is affected by wind and vibration, whether there are objects in contact with the scale, whether the sensor plug is in good contact, whether the sensor line has a break or false connection phenomenon.

• After turning on the flashing, does not show zero. Scale with or without load, whether the sensor plug contact is good, whether the sensor has a broken wire phenomenon, some sensors after some time, the resistance of the strain gauge changes lead to changes in the initial value, adjust the initial value.

• The monitor display data instability. That is, the same weighing load is added to the electronic scale, but several weighing display value is different. Generally generated by the weighing instrument and the sensor between the false connection, insulation aging, shielding damage, the insulation resistance between the core wire decreases, making the transmission signal fluctuates too much. Or filter capacitor and circuit board open solder, false solder caused by.

• Function key malfunction. First check whether there is dust and moisture in the contact part of the circuit board and keys, if there is, use alcohol to clean and bake a thousand. Check whether the keyboard and circuit board lines are disconnected or false connection. Check if the diode is damaged and the pin contact of the inverter 4049 is firm. Check whether the keyboard and the instrument shell installation are correct, that is, there is no card, squeeze, or other phenomena affecting the work of the keyboard.

• Weighing load, no weight display on the weighing display. No supply bridge voltage to the weighing sensor bridge input end, or sensor cable socket contact is not good, sensor signal cable aging fracture phenomenon caused by the amplifier no input signal. Or between the sensor and the scale body there is a foreign body, obstructing the elastomer deformation.

• The value of the error adjustment. The scale weight-bearing system is damaged by external forces, so that the mechanical structure deformation, fracture, and sensor force axis between the angle, resulting in the force is not true, resulting in weighing errors should be repaired or replaced. In electronic scales due to long-term use, the elastic modulus of the sensor elastomer and temperature coefficient will be changed. Or due to different areas of gravitational acceleration and error. Some electronic scales are adjusted by pulling two binary switches inside the instrument, some are calibrated by adjusting adjustable resistors, and others are adjusted by using the keyboard function keys.

Conclusion

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